TEA7091 Datasheet, PDF (3/7 Pages) STMicroelectronics – TELEPHONE ANALOG FRONT END

PIN DESCRIPTIONS
PQFP44
N^o Pins
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
PLCC44
N^o Pins
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
Names
VLS
VMC
VL
VREFL
LSIN
LSSOF
DTMF
VRMC
OSC
RI/VI
RESET
PON
CLK
DATA
SNSL
SNLL
ACFSL
ACFFI
RECIN
REOUT
GTR
HFIN
MIC1
MIC2
VREF
VCC
TSOFT
SOFTL
IREF
VS
SLP
GNDA
ILL
ISL
EAR+
EAR–
GREC
VZP
SWP
RSU
RCO
N.C.
GNDP
LSOUT
Functions
Loudspeaker power supply.
Unregulated microcontroller supply.
Line voltage.
Loudspeaker reference voltage.
Loudspeaker input.
Loudspeaker softclipping time constatnt.
DTMF filter.
Stabilized microcontroller supply.
Oscillator input.
Ring indicator / Line current variation indicator.
Microcontroller reset.
Power on output.
Clock data input.
Data Input.
Short line sidetone input.
Long line sidetone input.
Anti-acoustic feedback and squelch peak voltage.
Anti-acoustic feedback and squelch filter.
Receiving Input.
Receive output.
Transmit gain adjustment.
Handsfree microphone input.
Microphone input.
Microphone input.
Transmit and receive reference voltage (VCC/2).
Transmit and receive power supply.
Transmit soft-clipping time constant.
Maximum AC signal (Softclipping threshold).
Internal reference current.
Shunt regulator capacitor.
DC mask slope.
Analog Ground (signal).
Line current regulation start up.
Line current regulation stop.
Positive earphone output.
Negative earphone output.
Receive gain adjustment.
Switch mode power supply internal zener.
Switch mode power supply output.
Ring start up level.
Ring capacitor optimization (output power).
Not Connected.
Power Ground.
Loudspeaker Output.
TEA7091
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